Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 68/84
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Operating the relative time switch
The following parameters must be set for the relative time switch:
• Time_To_Check with days, hours, minutes and seconds
• Control parameters
Below you see a HMI interface for the relative time switch in the
configuration view at the OP3:
Enter time
Enable clock
Reset if necessary
"1“, if clock aktive
ot "0“, if error
during processing
Current date/time
in the S7-CPU
Consider each or only first
edge at input "StartTime"
Start-time
Fig. 6-13 HMI interface for the relative time switch (configuration view)
Note
The same clocks can also be operated and monitored with TP170A or with an
other HMI device. The OP3 is only given here as an example.
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